Lock for pneumatic thread removers



9, 1950 R. G. TURNER 2,520,580

LOCK FOR PNEUMATIC THREAD REMOVERS Filed May 28, 1949 FIGLI INVENTOR RICHARD G. TURNER ATTORNEY Patented Aug. 29,

LOOK FOR PNEUMATIC THREAD REMOVERS Richard G. Turner, Worcester, Mass, assignor to Crompton & Knowles Loom Works, Worcester, Mass., a corporation of Massachusetts Application May 28, 1949, Serial No. 96,084

This invention relates to pneumatic thread removers for weft replenishing looms and it is the general object of the invention to provide a simple form of-lock which will temporarily hold the thread remover in thread pick-up position.

Heretofore I have proposed a pneumatic thread remover comprising a tube formed with a thread intake mouth to receive the thread of the outgoing bobbin incident to a weft replenishing operation. The tube is normally in raised position and is lowered to thread pick-up position by the transferrer arm as the latter descends when pushing a reverse bobbin into the depleted shuttle. Thread removers of this type are customarily made with a form of friction means intended to hold the remover in either its raised or its lowered position, but experience shows that after considerable use the friction means is likely to fail in its holding function and permits the remover to rebound after being moved to its pickup position. If the remover rebounds sufficiently to elevate the thread pick-up lip behind the mouth above the thread the latter will pass under the remover without being attracted by the latter during backward motion of the lay.

It is an important object of the present invention to provide a simple lock means which will temporarily hold the thread remover in its pickup position. This lock acts automatically as the thread remover and its carrier is rocked by the transferrer arm and holds the remover so that the lip thereon will extend to a position below the level of the thread of the depleted bobbin in the shuttle.

It is customary to provide means for resetting the remover as the lay approaches its back center position immediately following bobbin transfer. This resetting is ordinarily accomplished by a vertically reciprocating rod operated by the lay and risin as the lay moves rearwardly. It is a further object of the invention to provide means by which the resetter moves the lock to unlocked position before the resetter engages the remover carrier to return the latter to its normal raised position.

The aforesaid resetter has a rising motion for each beat-up of the lay and in order to prevent it from repeatedly engaging the lock it is a still further object of the invention to provide a positioner which may be in the form of a cam which operates to move the lock out of the range of movement of the resetter as the latter'nears the upward limit of its motion during the first backward motion of the lay subsequent to bobbin transfer. r

' With these and other objects in view which will 9 Claims. (Cl. 139256) appear as the description proceeds, the invention resides in the combination and arrangement of parts hereinafter described and set forth.

'In the accompanying drawings, wherein two forms of the invention are set forth,

Fig. 1 is a side elevation of part of a weft replenishing loom having the preferred form of the invention applied thereto, the shuttle box and lay being shown in cross section and the thread remover being shown in its normal raised or idle position,

Fig. 2 is a view similar to a part of Fig. 1 but showing the thread remover in its operating or thread pick-up position,

Fig. 3 is an enlarged horizontal detailed section on line 33, Fig. 1, showing details of the preferred form of lock,

Fig. 4 is an enlarged vertical section on line 4-4, Fig. 1, showing the carrier for the thread remover in normal raised position with the lock in unlocked position and indicating the resetter in low position in full lines and in raised position in dotted lines,

Fig. 5 is an enlarged vertical section on line 5-5, Fig. 2, showing the remover carrier in thread pick-up position and the lock in looking position,

Fig. 6 is a view similar to a part of Fig. 1 but showing the modified form of lock, the thread remover being in its normal inactive position,

Fig. 7 is a view similar to a part of Fig. 6 showing the carrier for the thread remover in thread pick-up position and indicating the modifled form of lock in locking position, and

Fig. 8 is a detail plan view looking in the direction of arrow 8, Fig. 6.

Referring to Fig. 1, the loom frame ll) has mounted thereon a support II for a magazine M. The latter'may be of the rocking type and is mounted for angular movement on a stud l2 secured to the support H. The latter has mounted thereon the usual transferrer stud l3 on which the transferrer arm i4 is pivotally mounted. Arm M has secured thereto a laterally extending depressing pin or stud H) which overhangs an arm I6'of a remover carrier designated generally at I1; .The latter is mounted on the stud l3 for pivotal movement therearound and is normally held in any position to which it is moved by a friction means designated generally at l8. This means may include a spring l9 and a nut 20 to tighten the spring and force a, disk 21 of the'friction means against part ofthe carrier l1.

The carrier member I! may be made of sheet metal and has struck from the lower part thereof front and back ears and 26 in which is slidably mounted a rod 21 having secured thereto a collar 28 normally held against the rear ear 26 by a compression spring 29 surrounding that part of the rod between the front ear 25 and the collar. The efiect of the spring is to hold the rod 21 in rear position but permit it to yield forwardly.

A es is w e h hem es tube &0 her. ing an intake mouth 3| and a depending lip 32 behind the mouth. A thread deflecting wing is secured to and extends forwardly from the tube and is fixed to the rear'end'oi rod 2 1. A hose or flexible pipe 34 is connected to the upper end of tube 30 and leadsal's'o'u rcefo f "subatmospheric pressures which during oper; ation causes an inrush of air into the intake mouth 3|. A

A resetting rod or member 40 operated in, Known manner rises as the lay Q moves rearwardly and es shd a e a 4 m re iQPY EEQl i [Qt th s i'a s lobe to isaee a lil'ti'ng llugv or shelf $2 on h m hi fih ha Q i' hh h h' h with the wh re to norma idle po' l ct ion.

In the operation bi in? mepl xanisrn thus, far descifibied thej remover. R: and its; carrier be h h h, th hi behqh. s ewh he he: 1; was he mere; m h 3 an t' e: e 33 sieves into the"shuttIe' boxWVQn theday, at he h e w en r e r hhhih he 3 'awh 16 41 e heh' is W h d. lei ehhh e by unstrensrerrerem -aisTt h" latter n he was 1, h hh e IHR e k h de 5; are fiilhwie f itl e n t e Qi- W ed pick-up position shown 'Fig. 2 Kt ather t e h s h llii li er hr-gh salhe he. e h e i with hawhwehs h qhqhi hi elheh hh hi ei he hhh d a e r hf? a res he. the. me 45% he 19y, e e- REQEIEPPWQWE QJQQ X- r Q l 1. m? @llltfcm i l qj suchas pile fabric, and as the lay movesr ea vhe la hh ehhe t w h ehle he ha hh memes.ham we e e -ea z-he 'shheh. her at east. at h h ash s. drawn into the remover R. As the lay ap o nqla ches he. ath h h s io ext ll h hs eh l T936; Eli- 9%- hl fi, 4".- scr bed L- 339 QQnsh-hhheh em: maaam de and he htee 1h hhhher- In e pr -=-.rr.ed orm. on he nve ti n sh ne, o ra a fich er r n Fig 1, o. a ta ionar part of the loom, such as; amla te, under. hnport LL, has secu ed h reto a studriz i o which. piv ted a.- ock; member. 5-21. he t di has a.- he di 5?; and is Surrounded; b a torsion, pr n 51 he cheat of: which. s o canse he-l ock. member, to turn. in a: counten-clo ckwise direction as viewedin Fig. l. Thelockize-hasla release. lement. rifinger as for; cooperationwith a re-' lease arm.Shsecuredtotheresetteri40. The-upper. part of the lock, is .provided.. withalockinggfinger-fl or latch, 5,] which moves. oven a, part. 58; ot-sthev. carrier, t1; forthe. purpose of lockingrtherlatten in. down position The part 5&- may be formed: with a; control or. positioningc'cam. 59; normallyl engagingth latch 51.

Under normal conditions the lock and-controlcam 59 are in thepsition'showri.inj ig. '4; the carrier being in its raised or idle position, a iji the latch 51 being moved to the right so that the ebgvejfitepaerorcasse e s as'thei tez.

regularly reciprocating release arm 5'6. While the parts are in this position the resetter will rise and fall once for each beat of the loom without engaging the lock member. When a bobbin transfer operation occurs the stud l3 engages the arm [5 and rocks the carrier member I! as already described to lower the remover R, whereupon the latch arm 51, acted upon by spring 54, moves to t e left as viewed in Fig. 4 over the part 58 to the locking position shown in Fig. 5. already stated this lowering of the carrier occurswhen the resetter rod 40 is in low position so that the arm 55 will not interfere with movement githe finger 5 5, The lock member 52 holds the remover in position so that the lip 32 extend below the top of the race plate 46 to beunder the thread of the depleted bobbin as the lay -moves"rearwardly.

when the resetter 40 next rises its release arm 56 engages the finger 55 and rocks the lock 52 in v lehh se hr hoh. s iewed. he h s 5 he hh s h h sl t eh w i e thatch Q re .Qw.-- h itih' lh 3. a he es t r. w hheee thirheh hs he ehz e m mbe J back he) he heme-l h s hoa ere h he the em 5%. as; a se H ra Y hh 9thv h'th; h fiheer 55 s t at he Pa h at. th e eas are; 'hhe hi h c-$ 9 lh1 has he art er thev 'eh e i i-hl h' ls h h h hha.

I he hhqi ed. hath}. i he i rqh a. a. .5 rehe e r heeeemat w th the h hhs he; l s ne 5 sewedta h Search t 1 with a; s ee h hhh 29 e e. A, rsiphr hhe 68; hawl a h 8; e h e 9. ll 5.1%91 mehhe s e. W351i a ih e ih hhw se q Q ;3,Y 9. Q h: 6:. "this eek; e et ht, 1; aheair are t albhethe v h eehq es r e esa hshl is. he hh h ee: a m. te; nve ion pr ng 6h; mar he 55 n a. clockwis di ec ion: r m. welhq ihehsh z r n Fhe- S'I Qi h P hown nns, "tho-that ha e eht i es over heme Michele the remover R in down position withthelipnfi b hclcie he le el of: he: thr ad f, he. ou oing -Qhhin, Ah hist me od &4 wi be down, and s te i r itsfirst effect s o; en age thenelease. .1!: and; IQQK; the loch (51m: a counter.-- echw ei irec ion. as; ewed: in. Fig. '7; thereby,

'rnoving the:detent 'lq to ,the ;right to-unloch the his ,2; As cd tfizcontinuesltoriseit engages-the,

lug, th: and turns; the carrier I1: te. its.- normal: position, and indoing socauses the-lug to-slide. alone the. cam H to gixretthelocht 6h a, fur-then right hand motion which will move therelease;

element on inclined surface 1'2 out: of: the path up position with the lip 32 low enough to'enhh 'lh h e th ep' ehah hhn hfihe. wishe ere the heh h hhen, ifia ht h r. detent- 51- which moves over a part 5B o the s the detent 10 movesover apart'of the carrier, namely, the lifting lug 42, to hold the carrier locked in down position. In both forms the resetter effects unlocking of the lock member before it engages the lifting lug 42, and continued upward movement of the resetter to eifectreturn of the carrier to normal position causes the lock to have'a still further movement which moves it out of the path of the resetter.

Having thus described the invention it will be seen that changes and modifications of the foregoing specific disclosure may be made without departing from the spirit and scope of the invention.

What is claimed as new is:

1. In a weft replenishing loom having a pneumatic thread remover, a carrier for the thread remover mounted for movement relatively to the loom, means moving the carrier from the normal idle position thereof to a thread pick-up position incident to a weft replenishin operation of the loom, a lock normally in non-locking position with respect to the carrier when the latter is in the idle position thereof but moving to locking position with respect to the carrier when the latter is moved to the thread pickup position thereof, and a resetter for the carrier having a movement subsequent to said weft replenishing operation and effective during the first part of the movement thereof to move said lock to unlocking position with respect to the carrier and thereafter effective during the latter part of said movement to return said carrier to the normal idle position thereof.

2. In a weft replenishing loom having a bobbin transferrer arm and a pneumatic thread remover, the loom havin a stud on which the transferrer arm is pivotally mounted, a carrier member mounted on the stud for pivotal movement relatively thereto and normally in idle position but moved to thread pick-up position by the transferrer arm incident to a weft replenishing operation of the loom, a lock member normally in non-locking position relatively to the carrier when the latter is in the idle posi- 1 tion thereof and moving to locking position relatively to the carrier when the latter moves to said thread pick-up position thereof, and resetting means operating subsequent to said weft replenishing operation effective first to move said lock 5 member to unlocking position relatively to the carrier and thereafter move said carrier from said thread pick-up position thereof to the normal position thereof.

3. In a Weft replenishing loom having a bob- .bin transferrer arm and a pneumatic thread remover, a carrier member for the thread remover mounted for movement with respect to the loom, said carrier normally being in idle position and moved to thread pick-up :position by the transferrer arm incident to a weft replenishing operation of the loom, a lock member normally in non-locking position with respect to the carrier member when the latter is in the normal position thereof but moving into locking position with respect to the carrier member when the latter moves to the thread pick-up position thereof, a regularly moving resetter effective on a movement thereof subsequent to said weft replenishing operation first to move said lock I member to non-locking position relatively to the carrier member and thereafter return the carrier member from the thread pick-up position thereof to said normal idle position thereof, one of said members having a cam engaging the '6 other member --to effect movement of the -lock member out of the path'of the regularly moving resetter when the latter'returns the carrier member to thenormal idle position thereof;

4. In a weft replenishing loom having- 2. bobbintransferrer arm and-a pneumatic thread remover, a carrier forthe thread remover mounted for movement relatively to theloom, said carrier normally being in idle position and moved to thread pick-up position by the transferrer arm incident to'a weft replenishing operation of the 100m, a lock for the carrier, a pivot on which thelock is angularly movable fixed with respect to the 100111, said lock being in'non-locking position relatively to the carrierwhen the latter is in the normal idle position thereof, means moving the lock to locking position with respect to the carrier when the latter moves to the thread pick-up position thereof, and a, resetter having a movement subsequent to said weft replenishingoperation and effective during the first part of said movement to move the lock around the pivot thereof against the action of said means to non-locking position with respect to the carrier and thereafter return the carrier from the thread pick-up position thereof to the normal idle position thereof.

5. a In a weft replenishing loom having a bobbin transferrer arm and apneumatic thread remover, a carrier for the thread remover mounted on the loom for movement relatively thereto, said carrier normally being in idle position but moved to thread pick-up position by the transferrer arm incident to a weft replenishing operation of the loom, a lock member, a stationary pivotal support for the lock member, the latter having a release finger and a locking finger, the latter finger normally being in non-locking position with respect to the carrier when the latter is in the normal idle position thereof, said locking finger moving into locking position relatively to the carrier when the latter moves to the thread pick-up position thereof, and a resetter operative subsequent to said replenishing operation first to engage said release finger and rock said look about said pivot to move the locking finger to non-locking position with respect to the carrier, said resetter thereafter effective to return the carrier from the thread pick-up position thereof to the normal idle position thereof. i

6. The combination set forth in claim 5 wherein the carrier is provided with a cam for engagement with said release finger effective as the carrier moves to the idle position thereof to rock said lock in such manner as to move the release finger out of the path of said resetter.

'7. In a weft replenishing loom having a bobbin transferrer arm and a pneumatic thread remover, a carrier for the thread remover mounted for vertical movement relative to the loom and normally in raised idle position but moved downwardly by the transferrer arm to thread pickup position incident to a weft replenishing operation of the loom, a shelf forming part of said carrier, a lock normally in non-locking position with respect to said shelf when the carrier is in the normal idle position thereof but efiective to move into locking position with respect to said shelf to prevent movement of the carrier toward the normal position thereof when said carrier is moved to the thread pick-up position thereof, and a carrier resetter below said shelf effective by upward movement thereof subsequent to said weft replenishing operation first to engage and SJQMQQ move sa .1 01: to nqn ockin B itiQQ with KG: sp ot to said shelf and th rfiaf ey $18 15? 45am sh lf t raise the ca rier item the hma P t up position thereof o tm: nnxmal idl PQfiiEiQl! thereof.

8- In a wett repleni h ng 1 9m a .11s b9 991?! transferrer arm and a pneumat q thu .19- mov r. a a r membel r the thr w 7= mover moun ed. fo m vement. glati ely t9 ti loom. said ca e nqrmally being n $411!: D9 sitio but moved t thread pi kp p9ii n by th tran ferrer arm i ciden t a wait r l ni h mg operatign of e 0m, 9 1; m mb r 29 mally in nondoek ns ppa tion m tively fig it gamer m mber when the lattsir i in mrmgi idle positiqn th ut safie iv 9 m e my lock ng position rela vs y to m m r '99 m vent movemcnt 9f thg la tar 'rspt i tsward the normal posi on th me; ing d m o movement Q said cams! t9 th tnrs s 9195- up posit on, a re ga e elem n on 1 9 he}; L ps a r setta efiective subscqu n ts) fiflid wit 2e.- nlenishing opera iqn firs to g said la element and mpv said a t9 mm:

locki g po itin r lati ly to thc .wz ier mfim her and thema tm .sng said .ca mi mmb r a d return he latter mm the thri ad pick-up posit on thsa aoi to t e norma na ition there 9. In a wait Epic-animus 190m 11913 185 99??? 8. m i m arm a s a P a ma ic @Wsa m qy. a wrielr mem e fo tbs: th fia'i W319??? m unteq t er mq eme re at ly o th 992 and rmrmll in idl? PQSMQQ bu m e? *9 mad nigls yp n wwn b th tran i rre a inq m t9 wit r eni nin op ra iw Q W? 109 a 1m; xngmbs r rma in 1 31-1Q PKZR8 PP ZPZQP mla i #9 mt r r m W; t1 at-- ter is t c n rma idle it qn th rfl f BB? fifieqtv o mow? t? locking atiqp with tsn qt to the cam memb whim W? &9??? is mgv t .sa d aw-a n s -ug p fiti n 19PM by 9 a fiierr a to PFQYFIEP mQ fim Bt 9? the carrier in a direction toward the Q9393) position thereof, a ml a i? lmsmt 9? 5 15 .lp member a rke fitts r f 'ptiv WPWQLQ P P9 9 waft t p wish s o c on t9 aw? tn? F8? was? lment t m t e WJPP 29 52 8* leaking ositi a i y gafitt W??? h r and thma t wa e 95 an FE turn the latter to the normal idlg pqs ition PIIL BIQ o an am ans on p f T a d m bns ganga ging the other member gaffectjve g t h 'caLi ncr m m r returns t the WW idle ps i in thprepf to move said release glgmgnt out 91 the P5411311 Q aid reSetter- R CF ABP G- TUR ER- p m re es ci ed- 

